Aclaris Therapeutics, Inc.
ACRS- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001557746
No open-market purchases or sales by Aclaris Therapeutics, Inc. insiders were filed in the last 90 days; 148 institutions reported holding it in 13F filings for Q2 2026, worth $630.0M in total; no superinvestor holds it.
Holders of 5% or more of ACRS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Aclaris Therapeutics, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BML Investment Partners, L.P. | 13G/A | 11.90%14.3M shares | −1.40 ppfrom 13.30% | Feb 13, 20252 filings | Feb 9, 2026 | SEC |
| Bonita Biotech (HK) Ltd | 13G/A | 9.40%11.3M shares | – | Jan 9, 20261 filing | Jan 9, 2026 | SEC |
| Deep Track Capital, LP | 13G | 7.00%9.35M shares | New | Mar 17, 20261 filing | Mar 17, 2026 | SEC |
| BlackRock, Inc. | 13G/A | 6.20%6.70M shares | +1.10 ppfrom 5.10% | Jul 17, 20252 filings | Jan 21, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
15 Schedule 13D and 13G filings on Aclaris Therapeutics, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Sep 21, 20264:09 PM ET | Frazier Life Sciences Public Fund, L.P.and 8 others | 13G | 5.40%7.88M shares | New | Sep 14, 2026 | SEC |
| Aug 14, 20264:36 PM ET | Ra Capital Management, L.P.and 3 others | 13G/A | 9.10%12.7M shares | +2.80 ppfrom 6.30% | Jun 30, 2026 | SEC |
| May 12, 20269:48 PM ET | Vivo Opportunity Fund Holdings, L.P.and 3 others | 13G/A | 4.30%5.97M shares | –Below 5% | Mar 31, 2026 | SEC |
| Apr 27, 20267:26 PM ET | BML Investment Partners, L.P. | 13G/A | 9.90%13.9M shares | −2.00 ppfrom 11.90% | Apr 23, 2026 | SEC |
| Apr 7, 20265:59 PM ET | Ra Capital Management, L.P.and 3 others | 13G | 6.30%7.63M shares | New | Mar 31, 2026 | SEC |
| Mar 26, 20263:06 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −6.15 ppfrom 6.15%Below 5% | Mar 13, 2026 | SEC |
| Mar 17, 20264:16 PM ET | Deep Track Capital, LPand 2 others | 13G | 7.00%9.35M shares | New | Mar 9, 2026 | SEC |
| Feb 9, 20261:42 PM ET | BML Investment Partners, L.P. | 13G/A | 11.90%14.3M shares | −1.40 ppfrom 13.30% | Dec 31, 2025 | SEC |
| Jan 21, 202612:30 PM ET | BlackRock, Inc. | 13G/A | 6.20%6.70M shares | +1.10 ppfrom 5.10% | Dec 31, 2025 | SEC |
| Jan 9, 20268:59 AM ET | Bonita Biotech (HK) Ltdand 1 other | 13G/A | 9.40%11.3M shares | – | Dec 9, 2025 | SEC |
| Nov 13, 20259:05 AM ET | Adage Capital Management, L.P.and 2 others | 13G/A | 4.87%5.28M shares | −2.73 ppfrom 7.60%Below 5% | Sep 30, 2025 | SEC |
| Jul 29, 202511:22 AM ET | Vanguard Group Inc | 13G | 6.15%6.66M shares | +1.55 ppfrom 4.60% | Jun 30, 2025 | SEC |
| Jul 24, 20254:21 PM ET | Millennium Management LLCand 2 others | 13G/A | 3.50%3.84M shares | −1.60 ppfrom 5.10%Below 5% | Jun 30, 2025 | SEC |
| Jul 17, 20257:44 PM ET | BlackRock, Inc. | 13G | 5.10%5.47M shares | New | Jun 30, 2025 | SEC |
| May 15, 202510:45 AM ET | Rock Springs Capital Management LPand 4 others | 13G/A | 4.70%5.05M shares | –Below 5% | Mar 31, 2025 | SEC |
| May 12, 20259:07 AM ET | Adage Capital Management, L.P.and 2 others | 13G/A | 7.60%8.20M shares | −1.40 ppfrom 9.00% | Mar 31, 2025 | SEC |
| May 5, 20254:00 PM ET | Millennium Management LLCand 2 others | 13G | 5.10%5.54M shares | New | Apr 28, 2025 | SEC |
| Apr 30, 202510:53 AM ET | Vanguard Group Inc | 13G/A | 4.60%4.97M shares | –Below 5% | Mar 31, 2025 | SEC |
| Feb 13, 20252:26 PM ET | BML Investment Partners, L.P. | 13G/A | 13.30%14.3M shares | – | Dec 31, 2024 | SEC |
| Feb 12, 20259:31 AM ET | Adage Capital Management, L.P.and 2 others | 13G | 9.00%9.63M shares | New | Dec 31, 2024 | SEC |
| Feb 15, 2022 | Rock Springs Capital Management LP | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Venrock Healthcare Capital Partners II, L.P. | 13GOld format | – | New | – | SEC |
| Feb 11, 2022 | Foresite Capital Fund III, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Adage Capital Partners GP, L.L.C. | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2022 | Wellington Management Group LLP | 13GOld format | – | New | – | SEC |
| Jan 24, 2022 | Biotechnology Value Fund L P | 13GOld format | – | New | – | SEC |
| Feb 16, 2021 | Rock Springs Capital Management LP | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | EcoR1 Capital, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Foresite Capital Fund III, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Adage Capital Partners GP, L.L.C. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Aclaris Therapeutics, Inc. shares.
No Form 144 notices for Aclaris Therapeutics, Inc. are on file.